Only compare on secons in `parse & format` test, fix #36
Only compare on secons in `parse & format` test, fix #36

The format function ignores `utMicroSeconds` and the parse function
always initializes `utMicroSeconds` to 0. So we can't expect the original
value here, that information is lost.

kazu-yamamoto/unix-time,kazu-yamamoto/unix-time,archblob/unix-time